Homework Help: Chemistry

Posted by Brenda on Tuesday, January 11, 2011 at 10:25pm.

C2H2(g) + 2 H2(g)--> C2H6(g)

Substance So (J/mol∙K) ∆Hēf (kJ/mol)

C2H2(g 200.9 226.7

H2(g) 130.7 0

C2H6(g) -- -84.7

Bond Bond Energy (kJ/mol)
C-C 347
C=C 611
C-H 414
H-H 436

If the value of the standard entropy change, ∆Sē for the reaction is -232.7 joules per mole∙Kelvin, calculate the standard molar entropy, Sē, of C2H6
gas.

Calculate the value of the standard free-energy change, ∆Gē, for the reaction. What does the sign of ∆Gē indicate about the reaction above?

Calculate the value of the equilibrium constant for the reaction at 298 K.

Calculate the value of the C C (triple bond) bond energy in C2H2 in kJ/mole.

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